Synthesis and properties of regular star polybutadienes with 32 arms

L. L. Zhou*, N. Hadjichristidis, P. M. Toporowski, J. Roovers

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

95 Scopus citations


A dendrimer carbosilane containing 32 Si-Cl bonds in the perimeter has been prepared and has been used as a coupling agent to prepare 32-arm star polybutadienes. The dilute-solution properties 〈RG2〉, A2, [η], and D0 have been measured in one good solvent and in one θ-solvent. The dimensions of the 32-arm star polymers are compared with those of linear polymers at constant molecular weight. It is shown that the 32-arm star polybutadiene has the characteristic properties of a hard-sphere molecule in dilute solution. The equivalent hard-sphere radii calculated from A2, D0 and [η] are identical and 1.29 times larger than the root mean-square radius of gyration. The Daoud-Cotton scaling model for stars is also tested.

Original languageEnglish (US)
Pages (from-to)303-314
Number of pages12
JournalRubber Chemistry and Technology
Issue number2
StatePublished - 1992
Externally publishedYes

ASJC Scopus subject areas

  • Polymers and Plastics
  • Materials Chemistry


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